VERSATILE, HIGH PRECISION STEREO POINT TRANSFER DEVICE JULY AND AUGUST 1963 PROGRESS REPORT JOB #552

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A002900040092-6
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 10
• Document Creation Date: December 28, 2016
• Document Release Date: May 2, 2005
• Sequence Number: 92
• Content Type: REPORT

STAT
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VERSATILfi, HIGH PRECISION STBREO
POINT TRANSH ER UEV I+: E
JULY Al`dU AUC:LfST i~63
PR4G.4!'s5S kEsPC?i?T
JOB # X52
The following work has been accomplished during this
.reporting period The comments are organised under major sub
assemblies in the instrument
~ 1 ~ Oi3JrC:1 IVi3 t15S sI~lBLY
C.onf.iguratio*~ of objective assembly h,-~:a been ..aid
out and lens .focal lengths raetexwined~ Severa~. lenses have
been obtained, or ordered, for evaluation, I~rsalimnary test9
have been made on several of them None have 'been selected
until more complete tests azw completed. The loom magnif ier
me~;3-~~:is;~a used on #3II? Ct~'?rec~ ;Ji~wex is to he incorporated as
s:he oar i~.hl.e mac~nif icat ~.os~ element. ,: A turret msch3nisr~,
similar to that in the ~i344 and #373 Viewers, is to inc:e~r ~cnd
support the objective .lens.aea~ Detail design of the objective
assembly has oat start~ad, but is expected to begin during the
`- next reporting periods
2, EYEPIECE ASSEMBLY
The folded path eonf figuration presented in the
proposal for eyepiece assembly was found to have several
sh?rtc~smings. Tl~e principle disadvantage was rotation of
image, about 68?, wtaen eye stations were interchanged.
Se;~crzdly, the plane of image reversion Was across the width
of tae film rather than along i#s length Thir~3ly, thc~ dove
prisrar, originally Bhowr~, would have been or extr~att+~rly l,
kF~~E o:v des;. rlei3.
The . c~;~ . ~tv i;yg ~;re
.~titl+i$i,lf?J7~it7 WaAyS o~ 11ti?217C,j ~h2s e~7E~p1C'.Ct~.~
Tt~e.re wzi.~.' be three modes tadd? ~~vssible by use of
switching mirtvrs: St~r~~U, Ps$u_~c~~;;t.sraa .zl3cl lj~ac~e t~evt~rsion,
2Ylosr~ are accomplished ~y tiae uloi ' can of mirrara ~tI end I+72 and
t~:e r'enta re.flectars~ srlv~rn 1n F~igurre i,
F~4r stereos mirrors ril and M2 are shown in the
he~~vy Ii.ites far the two mirrors directly in front cif the
t~#`.eacape lenses. Tracii:y the path through the optical.
.~chen~~~-t .c you mill sed that tine image ~il'1 go t.hroueah the
pants reflectors, and then on to MI or M2 and then to the
eye, (Right objective lane to right eyelen=, ].eft o'-,_?ec?3.~re
lens to .Left eyslens~ )
trohen b1l and ~2 s~rf~ Lrc~cee? 2: t: to the clotted pasitions,
m5 ?ixt Rigure 1, Pseudo=5terQa w..11 ne acauwpli.shed through the
revera+~ ref aye stat;on~ ~ri.fi:h respect to thc~ right anti left
hand Qhjecti ve assembl i.es,
Image reversion is handled by the use of a plain
wirror and a pants reflector in each of ih? channels, :in
F.iguxe 1 it is seen that the path is normalb no reversion,
as sha~vr! with fih4 pe~~ta reflector ;hen t:~a per+ta re??z~~tcx
is tarried approximz~tely 12a?, as shown in the inset Figure 1,
a plain mirror will be put into its place causing one less
reflection and therefore, a reversion in the right-left plane
will be nc~ted~ Reversion in riyi~t and left channels is in~
~a~~endent of +3+1Ch other did independent also of the motions
rx ~irraxs :~1 ~.nd R92~
Approved For Release 2005/06/08 :CIA-RDP78B04747A002900040092-6
 STAT
Approved For Release 2005/06/08 :CIA-RDP78B04747A002900040092-6
2, EYEPIECE ASSEMBLY ~Contd~~
A second tune?ion in the eyepiece assembly is image
rot~:t..;~Qn~ Thia caprt~313 t< ; ~ hroti~E~'t about tlr~rc~tiS~~h tw ~tt:ins
of tt~e .f. .Jer bundZ~; Taro %~. l~~nc~h i